Composite film and manufacturing method thereof, and encapsulation structure including the composite film

ABSTRACT

The present invention discloses a composite film, a manufacturing method thereof and an encapsulation structure comprising the composite film. The composite film comprises at least one matrix membrane, each of which comprises at least one waterproof film. In the technical solutions provided by the present invention, the composite film comprises a matrix membrane comprising at least one waterproof film, and therefore, the composite film can be directly disposed on an OLED when the OLED is encapsulated by using the composite film. Accordingly, during an encapsulation process, the used process is simple, the process steps become less, the process time is short, and the required equipment is simpler, so that the production cost is reduced, and the production efficiency is improved.

FIELD OF THE INVENTION

The present invention relates to the field of display technology, andparticularly relates to a composite film and a manufacturing methodthereof, and an encapsulation structure including the composite film.

BACKGROUND OF THE INVENTION

Organic Light-Emitting Diodes (OLEDs) have the characteristic ofself-illumination, and OLEDs emit light when current passestherethrough. OLED display devices which perform display by using OLEDshave a large visual angle, and can significantly save electric energy,and therefore, OLED display devices are more and more widely used in thefield of display technology due to many unparalleled advantages comparedwith Liquid Crystal Displays (LCDs).

Organic film layers in the OLEDs are likely to fail due to the erosionof water and oxygen, and therefore, it is required to form anencapsulation layer capable of blocking water and oxygen above the OLEDsso as to protect the OLEDs. Generally, the encapsulation layer is a highwater-tightness hard encapsulation substrate, such as a glass or metalplate. Packaging adhesive is coated on a region, outside an OLED, of thesubstrate for carrying the OLED, and the substrate for carrying the OLEDand the hard encapsulation substrate are bonded with each other by thepackaging adhesive, so as to form a closed space impenetrable to waterand oxygen molecules between the two substrates, and the OLED is thusprotected. However, the hard encapsulation substrate belongs to a rigiddevice, which has poor flexibility, and therefore, it is not suitablefor packaging flexible OLEDs.

To solve the problem that the hard encapsulation substrate is notsuitable for packaging a flexible OLED, a technical solution in which awaterproof film is used as an encapsulation layer has been proposed inthe prior art. The waterproof film may be a dense film, such as SiOx,but the dense film has poor bendability; or, the waterproof film may bea film with good bendability, such as a polymer film, but the film withgood bendability has poor water-tightness. Therefore, to obtain anencapsulation layer with both good water-tightness and bendability inthe prior art, a structure in which inorganic films and organic filmsalternately arranged is generally used as the encapsulation layer.However, as there are many film layers in such encapsulation layer and astructure of each layer needs to be manufactured by using acorresponding film manufacturing process according to the materialthereof, many types of film manufacturing processes and many steps arerequired in the process of manufacturing the encapsulation layer, andthe manufacturing time is long; moreover, the manufacturing processneeds to be performed under an inert protecting environment (forexample, a vacuum or nitrogen environment), and many complicatedequipment need to be used in the manufacturing process. Thus, theproduction cost is improved, and the production efficiency is reduced.

SUMMARY OF THE INVENTION

The present invention provides a composite film and a manufacturingmethod thereof, and an encapsulation structure including the compositefilm, in order to reduce production cost and improve productionefficiency.

To achieve the above object, the present invention provides a compositefilm comprising at least one matrix membrane, each of which includes atleast one waterproof film.

Optionally, the number of the at least one matrix membrane is more thanone, each of the matrix membranes includes a plurality of waterprooffilms, and the waterproof films in adjacent matrix membranes arestaggered with each other.

Optionally, a spacing is formed between any adjacent waterproof films ineach of the matrix membranes, and each spacing in one of the matrixmembranes is opposite to the waterproof film in a matrix membraneadjacent to said one of matrix membranes.

Optionally, the plurality of waterproof films in a same matrix membraneare arranged in a same plane.

Optionally, the number of the matrix membranes is two to four.

Optionally, the number of the at least one matrix membrane is one, thenumber of the at least one waterproof film is more than one, the morethan one waterproof films are arranged in a plurality of layers, and thewaterproof films in adjacent layers are staggered with each other.

Optionally, a spacing is formed between any adjacent waterproof films ineach layer, and each spacing in one layer is opposite to the waterprooffilm in a layer adjacent to said one layer.

Optionally, a thickness of the matrix membrane is 1 μm-1000 μm.

Optionally, the matrix membrane is a flexible film, and the waterprooffilm is a rigid film.

To achieve the above object, the present invention provides anencapsulation structure, including a substrate, an OLED and the abovecomposite film, wherein the OLED is located on the substrate, and thecomposite film is located on the OLED.

To achieve the above object, the present invention provides amanufacturing method of a composite film, including a step of:

forming at least one matrix membrane, and forming at least onewaterproof film inside the matrix membrane in a process of forming theat least one matrix membrane.

Optionally, the step of forming at least one matrix membrane and formingat least one waterproof film inside the matrix membrane in the processof forming the at least one matrix membrane further includes:

a) forming a matrix membrane precursor layer;

b) forming at least one waterproof film on the matrix membrane precursorlayer;

c) forming another matrix membrane precursor layer on the at least onewaterproof film; and

d) performing a curing process to form one matrix membrane.

Optionally, the method further includes steps of: executing steps a)-d)repeatedly to obtain a plurality of matrix membranes, and laminating theplurality of matrix membranes to form a composite film including theplurality of laminated matrix membranes, wherein the waterproof films intwo adjacent matrix membranes are staggered with each other.

Optionally, the step of forming at least one matrix membrane and formingat least one waterproof film inside the matrix membrane in the processof forming the at least one matrix membrane further includes:

e) forming a matrix membrane precursor layer; and

f) forming a waterproof film layer including at least one waterprooffilm on the matrix membrane precursor layer, and forming another matrixmembrane precursor layer on the at least one waterproof film layer;

executing step f) repeatedly until a required number of waterproof filmlayers are formed, wherein the at least one waterproof film in any onewaterproof film layer and the at least one waterproof film in awaterproof film layer adjacent to said one waterproof film layer arestaggered with each other; and

performing a curing process on all the formed matrix membrane precursorlayers and waterproof film layers to form the matrix membrane, so as toobtain a composite film including one matrix membrane.

Optionally, performing a curing process comprises: performing the curingprocess through UV curing or thermocuring.

The present invention has the following beneficial effects:

In the technical solutions of the composite film and manufacturingmethod thereof and encapsulation structure provided by the presentinvention, the composite film includes a matrix membrane and at leastone waterproof film located inside the matrix membrane. The compositefilm can be directly disposed on an OLED when the OLED is encapsulatedby using the composite film. Accordingly, during an encapsulationprocess, the used process is simple, process steps become less, theprocess time is short, and the required equipment is simpler, so thatthe production cost is reduced, and the production efficiency isimproved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of a structure of a composite film according toEmbodiment 1 of the present invention;

FIG. 2 is a plan diagram of a matrix membrane in the composite filmaccording to Embodiment 1 of the present invention;

FIG. 3 is a diagram of a structure of a composite film according toEmbodiment 2 of the present invention;

FIG. 4 is a schematic diagram of an encapsulation structure according toEmbodiment 3 of the present invention;

FIG. 5 is a flowchart of a manufacturing method of a composite filmaccording to Embodiment 4 of the present invention;

FIG. 6 a is a schematic diagram of forming a matrix membrane precursorlayer in the manufacturing method of a composite film according toEmbodiment 4 of the present invention;

FIG. 6 b is a schematic diagram of forming a waterproof film in themanufacturing method of a composite film according to Embodiment 4 ofthe present invention;

FIG. 6 c is a schematic diagram of forming another matrix membraneprecursor layer in the manufacturing method of a composite filmaccording to Embodiment 4 of the present invention;

FIG. 6 d is a schematic diagram of a curing process in the manufacturingmethod of a composite film according to Embodiment 4 of the presentinvention;

FIG. 7 is a flowchart of a manufacturing method of a composite filmaccording to Embodiment 5 of the present invention;

FIG. 8 a is a schematic diagram of forming a matrix membrane precursorlayer in the manufacturing method of a composite film according toEmbodiment 5 of the present invention;

FIG. 8 b is a schematic diagram of an example of forming a waterprooffilm in the manufacturing method of a composite film according toEmbodiment 5 of the present invention;

FIG. 8 c is a schematic diagram of forming another matrix membraneprecursor layer in the manufacturing method of a composite filmaccording to Embodiment 5 of the present invention;

FIG. 8 d is a schematic diagram of forming other waterproof films andmatrix membrane precursor layers in the manufacturing method of acomposite film according to Embodiment 5 of the present invention; and

FIG. 8 e is a schematic diagram of a curing process in the manufacturingmethod of a composite film according to Embodiment 5 of the presentinvention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make those skilled in the art better understand the technicalsolutions of the present invention, the composite film and manufacturingmethod thereof and the encapsulation structure provided by the presentinvention will be described in details below with reference to theaccompanying drawings.

As one aspect of the present invention, there is provided a compositefilm including at least one matrix membrane, each of which includes atleast one waterproof film.

FIG. 1 is a schematic diagram of an exemplary structure of a compositefilm provided by Embodiment 1 of the present invention. As shown in FIG.1, there may be a plurality of matrix membranes, that is, the compositefilm may include a plurality of matrix membranes which are stacked up.Preferably, the number of the matrix membranes is two to four. In thisembodiment, the description is given by taking a case that the number ofthe matrix membranes is three as an example. The three matrix membranesare a matrix membrane 11, a matrix membrane 12 and a matrix membrane 13,respectively. The matrix membrane 11, the matrix membrane 12 and thematrix membrane 13 are stacked up, here, the matrix membrane 11 islocated on the matrix membrane 12, and the matrix membrane 12 is locatedon the matrix membrane 13.

Preferably, the thickness of each of the matrix membranes is 1 μm-1000μm. In this embodiment, as the thickness of each of the matrix membranesis 1_(μm-)1000 μm, both the problem of poor mechanical performance andpoor water-tightness due to too small thickness of each of the matrixmembranes and the problem of poor bendability and poor lighttransmission due to too large thickness of each of the matrix membranescan be effectively avoided, thus not only good mechanical performanceand water-tightness of the matrix membranes but also good bendabilityand light transmission of the matrix membranes are ensured. Preferably,each of the matrix membranes is the same in thickness. The fact that thematrix membranes each have the same thickness facilitates manufacturing.

Preferably, the matrix membranes are flexible films. The material of thematrix membranes may be selected from a group comprising the followingmaterials: polyimide, polyacrylate, polyethylene, polypropylene,polystyrene, polyethylene glycol terephthalate, polyethersulfone,polyethylene naphthalate, polycarbonate, polyvinyl chloride, polymethylmethacrylate, polybutylene terephthalate and poly(p-phenyldiethylsulfone). The waterproof films are rigid films. The material ofthe waterproof films may be selected from a group comprising thefollowing materials: SiO_(x), SiN_(x), Al₂O₃, Al, Ag, gold, ultrathinglass, diamond, graphene, ZnO, ZrO, and TiO₂. However, both the materialof the matrix membranes and the material of the waterproof films are notlimited to the above-listed materials.

There may be a plurality of waterproof films in each of the matrixmembranes. The waterproof films are capable of blocking water and oxygenmolecules. The waterproof films in the matrix membranes will bedescribed below by taking the matrix membrane 11 as an example. FIG. 2is a plan diagram of the matrix membrane 11, and there are a pluralityof waterproof films in the matrix membrane 11. In FIG. 1 and FIG. 2,three waterproof films, i.e., a waterproof film 111, a waterproof film112 and a waterproof film 113, located in the matrix membrane 11 areshown. It should be understood that, the number of the waterproof filmsin the substrate 11 as shown in FIG. 2 is merely exemplary, and thepresent invention is not limited thereto. Preferably, the plurality ofwaterproof films in a same matrix membrane are arranged in a same plane.As shown in FIG. 2, the waterproof film 111, the waterproof film 112 andthe waterproof film 113 in the matrix membrane 11 are arranged in a sameplane. The fact that the plurality of waterproof films are located in asame plane makes the manufacturing process of the waterproof filmssimple and easy to implement. The structures of the waterproof films inthe matrix membrane 12 and the matrix membrane 13 may refer to thedescription of the matrix membrane 11, and will not be repeatedredundantly here. Preferably, the waterproof films in each of the matrixmembranes are arranged at uniform intervals.

Preferably, the waterproof films in adjacent matrix membranes arestaggered with each other. As shown in FIG. 1 and FIG. 2, the waterprooffilms in the substrate 11 are staggered with the waterproof films in thematrix membrane 12, and the waterproof films in the matrix membrane 12are staggered with the waterproof films in the matrix membrane 13.Specifically, a spacing is formed between adjacent waterproof films ineach matrix membrane, and the spacing between adjacent waterproof filmsin one matrix membrane is arranged opposite to the waterproof film in amatrix membrane adjacent to the one matrix membrane. As the transversewidth of each spacing (the distance between any two adjacent waterprooffilms in a same matrix membrane) is less than that of the waterprooffilm opposite to the spacing, the spacing between the waterproof filmsin this matrix membrane is covered by the waterproof film in theadjacent matrix membrane. As shown in FIG. 1 and FIG. 2, for example, aspacing 114 is formed between the waterproof film 111 and the waterprooffilm 112 in the matrix membrane 11, and the spacing 114 and thewaterproof film 121 in the adjacent matrix membrane 12 are providedoppositely, so that the projection of the spacing 114 on the bottomsurface of the matrix membrane 11 is within the range of the projectionof the waterproof film 121 on the bottom surface of the matrix membrane11. As the matrix membranes are flexible films while the waterprooffilms are rigid films, the spacings between the waterproof films allowthat the whole composite film can be bent to a certain degree, and it isensured that the composite film has good bendability, so that thecomposite film is applicable to flexible OLEDs. In this embodiment, thebendability of the composite film is related to the size and arrangementpositions of the waterproof films, and therefore, the size andarrangement positions of the waterproof films may be set according tothe required bendability in practical applications. As water and oxygenmolecules may pass through the spacings between the waterproof films,the spacings in one matrix membrane and the waterproof films in a matrixmembrane adjacent to said one matrix membrane are provided oppositely inthis embodiment, which allows the water and oxygen molecules passingthrough the spacings of said one matrix membrane to be blocked by thewaterproof films in the matrix membrane adjacent to said one matrixmembrane. Specifically, the dotted arrow in FIG. 1 shows a permeationpath of the water and oxygen molecules in the composite film. The waterand oxygen molecules are blocked by the waterproof film in the matrixmembrane 12 after passing through the spacing in the matrix membrane 11such that the permeation process is suspended. After passing through thespacing in the matrix membrane 12, the water and oxygen molecules arefurther blocked by the waterproof films in the matrix membrane 13, suchthat the permeation process is further suspended. In conclusion, in thisembodiment, each spacing between adjacent waterproof films in each ofthe matrix membranes is opposite to a waterproof film in an adjacentmatrix membrane, which lengthens the length of the permeation path ofwater and oxygen molecules, therefore, the permeation process of waterand oxygen molecules is greatly suspended, and it is thus ensured thatthe composite film has good water-tightness.

The composite film provided by the present invention includes aplurality of matrix membranes, and each of the matrix membranes includesat least one waterproof film. The composite film can be directlydisposed on an OLED when encapsulating the OLED using the compositefilm. Therefore, during an encapsulation process, the used process issimple, the process steps become less, the process time is short, andthe required equipment is simpler, so that the production cost isreduced, and the production efficiency is improved.

FIG. 3 is a schematic diagram of an exemplary structure of a compositefilm provided by Embodiment 2 of the present invention. As shown in FIG.3, the composite film includes one matrix membrane 31, and the matrixmembrane 31 includes at least one waterproof film 311-319.

In this embodiment, there is one matrix membrane 31. Preferably, thethickness of the matrix membrane is 1 μm-1000 μm. In this embodiment, asthe thickness of the matrix membrane is 1 μm-1000 μm, both the problemof poor mechanical performance and poor watertightness due to too smallthickness of the matrix membrane and the problem of poor bendability andpoor light transmission due to too large thickness of the matrixmembrane may be effectively avoided, thus, not only good mechanicalperformance and watertightness of the matrix membrane but also goodbendability and light transmission of the matrix membrane are ensured.

Preferably, the matrix membrane is a flexible film. The material of thematrix membrane may be selected from a group comprising the followingmaterials: polyimide, polyacrylate, polyethylene, polypropylene,polystyrene, polyethylene glycol terephthalate, polyethersulfone,polyethylene naphthalate, polycarbonate, polyvinyl chloride, polymethylmethacrylate, polybutylene terephthalate and poly(p-phenyldiethylsulfone). The waterproof films are rigid films. The material ofthe waterproof films may be selected from a group comprising thefollowing materials: SiO_(x), SiN_(x), Al₂O₃, Al, Ag, gold, ultrathinglass, diamond, graphene, ZnO, ZrO, and TiO₂. However, both the materialof the matrix membrane and the material of the waterproof films are notlimited to the above-listed materials.

There are a plurality of waterproof films, and the waterproof films arecapable of blocking water and oxygen molecules. In this embodiment, thedescription is given by taking a case in which three layers ofwaterproof films are arranged in the matrix membrane 31 as an example.As shown in FIG. 3, the waterproof films in the first layer include: awaterproof film 311, a waterproof film 312 and a waterproof film 313;the waterproof films in the second layer include: a waterproof film 314,a waterproof film 315 and a waterproof film 316; and, the waterprooffilms in the third layer include: a waterproof film 317, a waterprooffilm 318 and a waterproof film 319. Preferably, the plurality ofwaterproof films in a same layer are arranged in a same plane.Preferably, the waterproof films are arranged at uniform intervals.

Preferably, the waterproof films in adjacent layers are staggered witheach other. As shown in FIG. 3, the waterproof films in the first layerare staggered with the waterproof films in the second layer, and thewaterproof films in the second layer are staggered with the waterprooffilms in the third layer. Specifically, a spacing is formed betweenadjacent waterproof films in the same layer, and the spacing betweenadjacent waterproof films in one layer is opposite to the waterprooffilm in a layer adjacent to said one layer. As the transverse width ofeach spacing (the distance between any two adjacent waterproof films ina same layer) is less than that of the waterproof films opposite to thespacing, the spacing between the waterproof films in this layer iscovered by the waterproof film in the adjacent layer. As shown in FIG.3, for example, the spacing 320 is formed between the waterproof film311 and the waterproof film 312 in the first layer, and the spacing 320is opposite to the waterproof film 314 in the second layer, so that theprojection of the spacing 320 on the bottom surface of the matrixmembrane 31 is within a range of the projection of the waterproof film314 on the bottom surface of the matrix membrane 31. As the matrixmembrane is a flexible film while the waterproof films are rigid films,the spacings between the waterproof films allow that the whole compositefilm can be bent to a certain extent, and it is ensured that thecomposite film has good bendability, so that the composite film isapplicable to flexible OLEDs. In this embodiment, the bendability of thecomposite film is related to the size and arrangement positions of thewaterproof films, and therefore, the size and arrangement positions ofthe waterproof films may be set according to the required bendability inpractical applications. As water and oxygen molecules can pass throughthe spacings between the waterproof films, the spacings between adjacentwaterproof films in one layer and the waterproof films in a layeradjacent to said one layer are provided oppositely in this embodiment,which allows the water and oxygen molecules passing through the spacingsof said one matrix membrane to be blocked by the waterproof films in thelayer adjacent to said one layer. Specifically, the dotted arrow in FIG.3 shows a permeation path of water and oxygen molecules in the compositefilm. The water and oxygen molecules are blocked by the waterproof filmin the second layer after passing through the spacing between thewaterproof films in the first layer, such that the permeation process issuspended. After passing through the spacing between the waterprooffilms in the second layer, the water and oxygen molecules are furtherblocked by the waterproof film in the third layer, such that thepermeation process is further suspended. In conclusion, in thisembodiment, each spacing between adjacent waterproof films in one layeris opposite to the waterproof film in the layer adjacent to said onelayer, which lengthens the length of the permeation path of water andoxygen molecules, therefore, the permeation process of water and oxygenmolecules is greatly suspended, and it is thus ensured that thecomposite film has good watertightness.

The composite film provided by the present invention includes a matrixmembrane and at least one waterproof film located inside the matrixmembrane. The composite film can be directly disposed on an OLED whenencapsulating the OLED using the composite film. Therefore, during anencapsulation process, the used process is simple, the process stepsbecome less, the process time is short, and the required equipment issimpler, so that the production cost is reduced, and the productionefficiency is improved.

FIG. 4 is a schematic diagram of an encapsulation structure provided byEmbodiment 3 of the present invention. As shown in FIG. 4, theencapsulation structure includes a substrate 1, an OLED 2 and acomposite film 3. The OLED 2 is located on the substrate 1, and thecomposite film 3 is located on the OLED 2, wherein, the composite film 3may be the composite provided in Embodiment 1 or Embodiment 2, and willnot be repeated redundantly here.

The composite film 3 may have an effect of blocking water from the OLED2. Optionally, the composite film 3 covers the whole substrate 1.

Optionally, the encapsulation structure may further include a bufferlayer 4, which is located between the OLED 2 and the composite film 3,and covers the whole substrate 1.

In the encapsulation structure provided by this embodiment, thecomposite film includes a matrix membrane and at least one waterprooffilm located inside the matrix membrane. The composite film can bedirectly disposed on an OLED when encapsulating the OLED using thecomposite film. Therefore, during an encapsulation process, the usedprocess is simple, the process steps become less, the process time isshort, and the required equipment is simpler, so that the productioncost is reduced, and the production efficiency is improved.

According to another aspect of the present invention, a manufacturingmethod of a composite film is provided. The method includes a step of:forming a matrix membrane, and forming at least one waterproof film inthe matrix membrane in a process of forming the matrix membrane.

The composite film manufactured by the manufacturing method of acomposite film provided by the present invention includes a matrixmembrane, and at least one waterproof film is formed in the matrixmembrane. The composite film can be directly disposed on an OLED whenencapsulating the OLED using the composite film. Therefore, during anencapsulation process, the used process is simple, the process stepsbecome less, the process time is short, and the required equipment issimpler, so that the production cost is reduced, and the productionefficiency is improved.

FIG. 5 is a flowchart of a manufacturing method of a composite filmaccording to Embodiment 4 of the present invention. As shown in FIG. 5,the method includes steps as follows.

At step 101, a matrix membrane precursor layer is formed.

FIG. 6 a is a schematic diagram of forming a matrix membrane precursorlayer in the manufacturing method of a composite film according toEmbodiment 4 of the present invention. As shown in FIG. 6 a, a matrixmembrane precursor layer 61 is formed by spin-coating, blade-coating orspray-coating. The matrix membrane precursor layer 61 may be formed fromflexible material.

At Step 102, at least one waterproof film is formed on the matrixmembrane precursor layer.

FIG. 6 b is a schematic diagram of forming waterproof films in themanufacturing method of a composite film according to Embodiment 4 ofthe present invention. As shown in FIG. 6 b, waterproof films 62 areformed on the matrix membrane precursor layer 61 by placing, physicaldeposition or chemical deposition. There may be a plurality ofwaterproof films 62, and a spacing may be formed between two adjacentwaterproof films 62. Preferably, the spacings between adjacentwaterproof films 62, i.e., the lengths of the spacings in a horizontaldirection shown in FIG. 6 b, may be of an equal size. The waterprooffilms 62 may be formed from rigid material.

At step 103, another matrix membrane precursor layer is formed on the atleast one waterproof film.

FIG. 6 c is a schematic diagram of forming another matrix membraneprecursor layer in the manufacturing method of a composite filmaccording to Embodiment 4 of the present invention. As shown in FIG. 6c, a matrix membrane precursor layer 63 is formed on the waterprooffilms 62 by spin-coating, blade-coating or spray-coating. Similarly, thematrix membrane precursor layer 63 may be formed from flexible material.After step 103, a laminated structure including the matrix membraneprecursor layer 61, the matrix membrane precursor layer 63 and aplurality of waterproof films 62 sandwiched therebetween is obtained.

At step 104, the structure obtained through step 103 is cured to form amatrix membrane.

FIG. 6 d is a schematic diagram of a curing process in the manufacturingmethod of a composite film according to Embodiment 4 of the presentinvention. As shown in FIG. 6 d, the structure obtained through step 103is cured by UV curing or thermocuring so as to form a matrix membrane64.

At step 105, steps 101-104 are executed repeatedly so as to fabricate aplurality of matrix membranes.

At Step 106, the plurality of formed matrix membranes are laminated.

Specifically, the plurality of formed matrix membranes may be laminatedby a laminating device so as to form a composite film, wherein thewaterproof films in two adjacent matrix membranes are staggered witheach other. That is, each waterproof film in one matrix membrane is setto be opposite to each spacing included in the matrix membrane adjacentto said one matrix membrane.

The manufacturing method of a composite film provided by this embodimentmay be used for manufacturing the composite film described in Embodiment1, and therefore, the specific description of the matrix membranes andwaterproof films can refer to Embodiment 1 and will not be repeatedredundantly here.

The composite film manufactured by the manufacturing method of acomposite film provided by the present invention includes matrixmembranes and at least one waterproof film located in the matrixmembranes. The composite film can be directly disposed on an OLED duringencapsulating the OLED using the composite film. Therefore, during anencapsulation process, the used process is simple, the process stepsbecome less, the process time is short, and the required equipment issimpler, so that the production cost is reduced, and the productionefficiency is improved.

FIG. 7 is a flowchart of a manufacturing method of a composite filmprovided by Embodiment 5 of the present invention. As shown in FIG. 7,the method includes steps as follows.

At step 201, a matrix membrane precursor layer is formed.

FIG. 8 a is a schematic diagram of forming a matrix membrane precursorlayer in the manufacturing method of a composite film according toEmbodiment 5 of the present invention. As shown in FIG. 8 a, a matrixmembrane precursor layer 81 is formed by spin-coating, blade-coating orspray-coating. The matrix membrane precursor layer 81 may be formed fromflexible material.

At step 202, at least one waterproof film is formed on the matrixmembrane precursor layer.

FIG. 8 b is a schematic diagram of forming waterproof films in themanufacturing method of a composite film according to Embodiment 5 ofthe present invention. As shown in FIG. 8 b, a layer of waterproof films82 is formed on the matrix membrane precursor layer 81 by placing,physical deposition or chemical deposition. There may be a plurality ofwaterproof films 82, and a spacing may be formed between two adjacentwaterproof films 82. Preferably, the spacings between adjacentwaterproof films 82, i.e., the lengths of the spacings in a horizontaldirection as shown in FIG. 6 b, may be of an equal size. The waterprooffilms 82 may be formed from rigid material.

At step 203, another matrix membrane precursor layer is formed on the atleast one waterproof film.

FIG. 8 c is a schematic diagram of forming another matrix membraneprecursor layer in the manufacturing method of a composite filmaccording to Embodiment 5 of the present invention. As shown in FIG. 8c, a matrix membrane precursor layer 83 is formed on the waterprooffilms 82 by spin-coating, blade-coating or spray-coating. Similarly, thematrix membrane precursor layer 83 may be formed from flexible material.

At step 204: steps 202-203 are executed repeatedly until the requiredlayers of waterproof films are formed.

In this embodiment, the description is performed by taking a case inwhich three layers of waterproof films are formed as an example. FIG. 8d is a schematic diagram of forming three layers of waterproof films andthree layers of matrix membrane precursor layers in Embodiment 5. Asshown in FIG. 8 d, a plurality of waterproof films 84 are formed on thematrix membrane precursor layer 83 by placement, physical deposition orchemical deposition, so that each spacing between two adjacentwaterproof films 84 is opposite to a waterproof film 82 formed in step202, and the waterproof films 82 in the former layer are staggered withthe waterproof films 84 in the latter layer. Then, similarly, a matrixmembrane precursor layer 85 is formed on the waterproof films 84 byspin-coating, blade-coating or spray-coating, and waterproof films 86are formed on the matrix membrane precursor layer 85 by placement,physical deposition or chemical deposition, so that the spacings betweenany two adjacent waterproof films 86 are opposite to the waterprooffilms 84, respectively. Subsequently, a matrix membrane precursor layer87 is formed on the waterproof films 86 by spin-coating, blade-coatingor spray-coating. Therefore, a laminated structure including the matrixmembrane precursor layer 81, the first layer of waterproof films 82, thematrix membrane precursor layer 83, the second layer of waterproof films84, the matrix membrane precursor layer 85, the third layer ofwaterproof films 86 and the matrix membrane precursor layer 87, whichare sequentially provided, are formed.

At step 205: the structure obtained through step 204 is cured to form amatrix membrane.

FIG. 8 e is a schematic diagram of a curing process in the manufacturingmethod of a composite film according to Embodiment 5 of the presentinvention. As shown in FIG. 8 e, the structure obtained through step 204is cured by UV curing or thermocuring so as to form a matrix membrane 8,wherein the waterproof films in two adjacent layers are staggered witheach other. That is, each waterproof film in one layer is set to beopposite to the spacing included in a layer adjacent to said one layer.

In the composite film manufactured by the manufacturing method of acomposite film provided by this embodiment, one matrix membrane and aplurality of waterproof films are included, and the plurality ofwaterproof films are arranged by layers.

The manufacturing method of a composite film provided by this embodimentmay be used for manufacturing the above composite film described inEmbodiment 2, and therefore, the specific description of the matrixmembrane and waterproof films may refer to Embodiment 2 and will not berepeated redundantly here.

The composite film manufactured by the manufacturing method of acomposite film provided by the present embodiment includes a matrixmembrane and at least one waterproof film located in the matrixmembrane. The composite film can be directly disposed on an OLED whenencapsulating the OLED using the composite film. Therefore, during anencapsulation process, the used process is simple, the process stepsbecome less, the process time is short, and the required equipment issimpler, so that the production cost is reduced, and the productionefficiency is improved.

It should be understood that the foregoing implementations are merelyexemplary implementations for describing the principle of the presentinvention, but the present invention is not limited thereto. A person ofordinary skill in the art may make various transformations andimprovements without departing from the spirit and essence of thepresent invention, and these transformations and improvements are alsodeemed as falling into the protection scope of the present invention.

1. A composite film, comprising at least one matrix membrane, whereineach matrix membrane includes at least one waterproof film.
 2. Thecomposite film according to claim 1, wherein, the number of the at leastone matrix membrane is more than one, each of the matrix membranescomprises a plurality of waterproof films, and the waterproof films inadjacent matrix membranes are staggered with each other.
 3. Thecomposite film according to claim 2, wherein a spacing is formed betweenany adjacent waterproof films in each of the matrix membranes, and eachspacing in one of the matrix membranes is opposite to the waterprooffilm in a matrix membrane adjacent to said one of the matrix membranes.4-15. (canceled)
 16. The composite film according to claim 2, whereinthe plurality of waterproof films in a same matrix membrane are arrangedin a same plane.
 17. The composite film according to claim 3, whereinthe plurality of waterproof films in a same matrix membrane are arrangedin a same plane.
 18. The composite film according to claim 2, whereinthe number of the matrix membranes is two to four.
 19. The compositefilm according to claim 3, wherein the number of the matrix membranes istwo to four.
 20. The composite film according to claim 1, wherein thenumber of the at least one matrix membrane is one, the number of the atleast one waterproof film is more than one, the more than one waterprooffilms are arranged in a plurality of layers, and the waterproof films inadjacent layers are staggered with each other.
 21. The composite filmaccording to claim 21, wherein a spacing is formed between any adjacentwaterproof films in each layer, and each spacing in one layer isopposite to the waterproof film in a layer adjacent to said one layer.22. The composite film according to claim 1, wherein a thickness of thematrix membrane is 1 μm-1000 μm.
 23. The composite film according toclaim 1, wherein the matrix membrane is a flexible film, and thewaterproof film is a rigid film.
 24. An encapsulation structure,comprising a substrate, an organic light-emitting diode and thecomposite film according to claim 1, wherein the organic light-emittingdiode is located on the substrate, and the composite film is located onthe organic light-emitting diode.
 25. The encapsulation structureaccording to claim 24, wherein, the number of the at least one matrixmembrane is more than one, each of the matrix membranes comprises aplurality of waterproof films, and the waterproof films in adjacentmatrix membranes are staggered with each other.
 26. The encapsulationstructure according to claim 25, wherein a spacing is formed between anyadjacent waterproof films in each of the matrix membranes, and eachspacing in one of the matrix membranes is opposite to the waterprooffilm in a matrix membrane adjacent to said one of the matrix membranes.27. The encapsulation structure according to claim 25, wherein theplurality of waterproof films in a same matrix membrane are arranged ina same plane.
 28. A manufacturing method of a composite film, comprisinga step of: forming at least one matrix membrane, and forming at leastone waterproof film inside the matrix membrane in a process of formingthe at least one matrix membrane.
 29. The manufacturing method of acomposite film according to claim 28, wherein the step of forming atleast one matrix membrane and forming at least one waterproof filminside the matrix membrane in the process of forming the at least onematrix membrane further comprises: a) forming a matrix membraneprecursor layer; b) forming at least one waterproof film on the matrixmembrane precursor layer; c) forming another matrix membrane precursorlayer on the at least one waterproof film; and d) performing a curingprocess to form one matrix membrane.
 30. The manufacturing method of acomposite film according to claim 29, further comprising steps of:executing steps a)-d) repeatedly to obtain a plurality of matrixmembranes, and laminating the plurality of matrix membranes to form acomposite film comprising the plurality of laminated matrix membranes,wherein the waterproof films in two adjacent matrix membranes arestaggered with each other.
 31. The manufacturing method of a compositefilm according to claim 28, wherein the step of forming at least onematrix membrane and farming at least one waterproof film inside thematrix membrane in the process of forming the at least one matrixmembrane further comprises: e) forming a matrix membrane precursorlayer; and f) forming a waterproof film layer comprising at least onewaterproof film on the matrix membrane precursor layer, and forminganother matrix membrane precursor layer on the waterproof film layer;executing step f) repeatedly until a required number of waterproof filmlayers are formed, wherein the at least one waterproof film in any onewaterproof film layer and the at least one waterproof film in awaterproof film layer adjacent to said one waterproof film layer arestaggered with each other; and curing all the formed matrix membraneprecursor layers and waterproof film layers to form the matrix membrane,so as to obtain a composite film comprising one matrix membrane.
 32. Themanufacturing method of a composite film according to claim 28, whereinthe curing process is performed through UV curing or thermocuring.